HHC, or hexahydrocannabinol, is a cannabinoid that is derived from cannabis plants, particularly hemp. It is chemically similar to THC (delta-9 tetrahydrocannabinol), the well-known psychoactive compound in marijuana, but with some structural differences. HHC is created through a chemical process called hydrogenation, where hydrogen molecules are added to THC, converting it into hexahydrocannabinol.